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20260427-null-after-free #26

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Merged
dgarske merged 1 commit into from
May 5, 2026
Merged

20260427-null-after-free #26

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5 changes: 4 additions & 1 deletion kernel-src/device.c
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Original file line number Diff line number Diff line change
Expand Up @@ -471,12 +471,15 @@ static int wg_newlink(struct net *src_net, struct net_device *dev,
err_free_tstats:
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 9, 0)
free_percpu(dev->tstats);
dev->tstats = NULL;
err_free_index_hashtable:
#endif
kvfree(wg->index_hashtable);
wg->index_hashtable = NULL;
err_free_peer_hashtable:
memzero_explicit(wg->peer_hashtable->key, sizeof wg->peer_hashtable->key);
memzero_explicit(wg->peer_hashtable->key, sizeof wg->peer_hashtable->key);
kvfree(wg->peer_hashtable);
wg->peer_hashtable = NULL;
WC_DEBUG_PR_NEG_RET(ret);
}

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2 changes: 2 additions & 0 deletions kernel-src/ratelimiter.c
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Expand Up @@ -258,8 +258,10 @@ void wg_ratelimiter_uninit(void)
rcu_barrier();
memzero_explicit(key, sizeof key);
kvfree(table_v4);
table_v4 = NULL;
#if IS_ENABLED(CONFIG_IPV6)
kvfree(table_v6);
table_v6 = NULL;
#endif
kmem_cache_destroy(entry_cache);
out:
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